<!DOCTYPE html>
<html>
<body>
<iframe width="420" height="345" src="https://www.youtube.com/watch?v=205SZVvGAls''>
</iframe>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<audio controls>
<source src="horse.ogg" type="audio/ogg">
<source src="horse.mp3" type="audio/mpeg">
</audio>
</body>
</html>